Note: Some functions of this site require your browser to support JavaScript. JavaScript is not enabled in your browser. Without JavaScript, you will not be able to use some features of this site. Either enable JavaScript in your browser or use another computer in which JavaScript is enabled.

Physiology Quiz -Skeletal Muscle Physiology - Part 6

Skeletal muscle cells are characterized by their striated appearance when visualized under the light and electron microscopes. Collectively, skeletal muscle cells make up approximately 50% of the body’s wet (i.e., soft tissue) weight. Skeletal muscle cells perform highly important functions including generating force, motion, and even heat. Test your basic knowledge of skeletal muscle physiology by taking this simple quiz.

(1) In skeletal muscle cells, the ryanodine receptors of the sarcoplasmic reticulum are voltage-gated ion channels.

True

False

(2) In skeletal muscle cells, the ryanodine receptors are located in this cellular compartment:

(A) Plasma membrane

(B) Sarcoplasmic reticulum membrane

(C) Mitochondrial membrane

(D) All of the above

(3) In skeletal muscle cells, permeation of this ion through the pore of the ryanodine receptors provides the basis for muscle contraction:

(A) Na+

(B) K+

(C) Ca2+

(D) H+

(E) Cl−

(4) Which of the following is the smallest skeletal muscle in the human body?

(A) Gluteus maximus

(B) Sartorius

(C) Stapedius

(D) Masseter

(E) Deltoid

(5) Which of the following is the largest skeletal muscle in the human body?

(A) Gluteus maximus

(B) Sartorius

(C) Stapedius

(D) Masseter

(E) Deltoid

(6) Which of the following is the longest skeletal muscle in the human body?

(A) Gluteus maximus

(B) Sartorius

(C) Stapedius

(D) Masseter

(E) Deltoid

(7) Which of the following is the strongest skeletal muscle in the human body?